Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sf2a.conf..573c&link_type=abstract
SF2A-2005: Semaine de l'Astrophysique Francaise, meeting held in Strasbourg, France, June 27 - July 1, 2005, Edited by F. Casoli
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
The comparison of HI, CO, dust, and gamma-ray maps in the solar neighborhood has led to the discovery of large amounts of dark gas not traced in HI and CO at the transition between the two phases. Its mass extrapolated to the Galaxy is equivalent or larger than the H2 mass detected in CO. The column-densities and angular extent of the local dark clouds, as well as their clumpiness, imply severe revisions of the gamma-ray interstellar emission model to high latitudes, therefore of the detectability of gamma-ray sources above this background. Numerous persistent unidentified EGRET sources are not confirmed as significant sources.
Casandjian Jean-Marc
Grenier Isabelle A.
Terrier Régis
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